Heater



W. P. MERRY.

HEATER.

APPLICATION FILED MAR. 15. I919.

1 328,246, Patented Jan. 13, 1920.

UNITE STATES PATENT OFFICE.

WHITIN Gr P. MERR Y, OF SHARPSVILLE, PENNSYLVATIIA.

HEATER.

Application filed March 15, 1919.

To all whom it may concern:

Be it known that I, WHITING P. MERRY, a citizen of the United States,residing at Sharpsville, in the county of Mercer and State ofPennsylvania, have invented certain new and useful Improvements inHeaters, of which the following is a specification, reference being hadto the accompanying drawlngs.

This invention relates to an improved heater, particularly to a furnaceor stove type, and an object of the invention is to provide a device ofthis kind, which is simple and practical in construction, and which maybe manufactured for a small cost and sold at a reasonable profit.

A further object of the invention is to pro vide a heater provided witha fire box, a hot air drum super-imposed with relation to the box and acold air flue with its perforated end terminating in the hot air drum,whereby the air from the flue, as it enters the drum through theperforated end of the flue becomes highly heated, thereby providing pureheat which escapes from the drum into the room, in which the heater islocated. If desired, various-fiues may be connected to the drum, forcarrying the heat to localities remote from the heater.

The invention further aims to provide a' double wall casing insurrounding spaced relation from the wall of the fire box, therebyproviding an air space, the cool air which passes therethrough becomingalso heated. This heated air also escapes into the room, since the upperend of the double wall casing opens into the room.

It is obvious that since the outer casing consists of double spacedwalls, an additional cold air space is afforded.

A further object of the invention is ..the provision of a cold air draftflue passing up through the fire box and having its upper closed endperforated about the fuel which may be either coal or wood, therebyproviding a draft in the box.

The design of the structure as now illustrated is deemed preferable.However, in reducing the structure of the device to a more practicalform for commercial purposes, alterations' in the details ofconstruction may be found necessary. The right to these alterations isclaimed, provided the alterations fall within the scope of what isclaimed. J

1 The invention comprises farther features Specification of LettersPatent.

Patented Jan. 13, 1920.

Serial No. 282,806.

and combination of parts, as hereinafter set forth, shown in thedrawings and claimed.

In the drawings:

Figure 1 is a view in side elevation of the improved heater constructedin accordance with the invention.

Fig. 2 is a vertical sectional view on line 2-2 of Fig. 1, therebyillustrating the various features of construction, namely the variousflues and air spaces.

Fig. 3 is a transverse sectional view on line 33 of Fig. 2.

Fig. a is a vertical sectional view through one-half of the heater atright angles to that shown in Fig. 2, thereby showing the cold airspaces 19 and 20, and also showing the openings 18*, which allow air toenter the space 19.

Referring to the drawings, 1 designates an ash pit, which receives theslides or drawers 2, for the reception of the ashes.

Arranged above the ash pit is an inner casing 3, the lower portion ofwhich constitutes a firebox 4, provided with the usual grate bars 5.This inner casing is provided -with a restricted upper end portion 6.

Arranged in the casing 3 is a hot air drum or dome 7, the upper end ofwhich also terminates in a restricted portion 8, the wall of which isconnected to the restricted upper end portion 6 of the casing 3, asshown at 9. Obviously the restricted upper end 8 extends into therestricted upper end 6. A. cold air flue -10 enters the bottom of thehot air drum or dome, and its end portion 11 is open immediately abovethe inner surface of the bottom of said dome. The other end of the airflue 10 is open and receives a supply of cold air from any suitablesource the air adapted to pass through the flue l0 and subsequentlyenter the drum or dome. The dome .or drum becomes heated to a very highdegree, and the inrush of the cold air through the flue 10, willconsequently'become heated to a very high degree. This -heated air mayescape into the room, in

which the heater is located. However, the upper end of the drum or domemay have connected thereto several fines, for conducting the heated airto other localities, if de immediately below its; end 13,. thatisbetween its closed end 13 and the upper surface of the fire bed issupplied with a plurality of perforations 14, thereby permitting of theescape of the cool air into the fire box, thereby affording a bettercombustion, and insuring a draft. Obviously the mixing of the cold airfrom the flue 12 with the heat arising from the fire in the fire boxaffords a combustion of such a nature as to consume the most of thesmoke, thus producing additional heat, which radiates through the drumor dome. A smoke flue 15 is connected to the upper part of the casing 3,and to which any suitable carrying-off flue (not shown) may be connectedfor conducting vthe smoke to the exterior atmosphere, exteriorly of theroom in which the heater is located.

Arranged in surrounding spaced relation to the casing 3 is an outercasing 16, which comprises the walls 17 and 18. By spacing the outercasing 16 from the casing 3, a hot air space 19 is afiorded. Owing tothe casing 16 consisting of the walls 17 and 18, which are spaced. anextra air space 20 is provided. The outer wall 18 of the casing 16extends upwardly and substantially a trifle more than half the height ofthe heater, and cold air is allowed to enter this space 20 at the lowerpart of the heater, some of which may pass through the openings 21 intothe space 19, while the greater portion of such air mixes with the airthat may pass from the space 19 through the openings 21, and thismixture is allowed to escap'e at the top of the outer wall 18, which, aspreviously stated, terminates considerably below the top of the heater.The space 20 between the walls 17 and 18 constitutes a cold air draftspace, acting to reduce the intensity of the heat about that portion ofthe wall of the heater near the fire pot.

Cold air also enters the space 19 at the lower part of the heater.through the openings 18, which are formed at the base or lower portionof the inner wall 17. of the 'asing 16. This cold air passing betweenthe wall of the fire pot casing and the wall 17, also acts to reduce theintensity of the heat emanating immediately from the fire pot casing.The cold air which enters the space 19 either enters the space 20,through the openings 21, or ascends into the upper part of the space 19,where it may be allowed to escape into the room, by opening the dampercontrolled openings 22. By closing the damper controlled openings 22,the cold air which enters the space 19 through the openings 18*- will beso controlled as to cause someof the air to pass through the openings21, into the space 20. In fact, the cold air entering the space 19 maybe regulated. It is true, however, that the air that passes through theopenings 21' into the space 20 also passes into the room, hilt it is notso intensely heated as it is when it is allowed to ascend into the upperpart of the space 19, and allowed to pass into the room, by opening thedamper controlled openings 22, since 1t is more intensely heated inpassing along the wall of the fire pot casing.

It is to be noted that short fiues or pipes 20 are arranged in theseveral walls of the heater, that is at apoint just a little above thefire pot, so that a minimum amount of heat may passtheretln'ough to theexterior of the heater; The outer ends of these short fiues or pipes maybecontrolled by dampers, not shown. The air that passes through theopenings 18 passes upwardly through the fire box, upon opposite sides ofthe ash pit, which receives the slides or drawers 2. In other words, theash pit is not constructed to conform to the full diameter of theheater, that is at right angles to the arrangement of the ash pit. sothat the air may pass upwardly upon either side, as will be thoroughlyunderstood from Fig. 3.

The invention-having been set forth, what is claimed as new and usefulis:

1. In a heater, the combination with an inner casing provided with afire box and an ash pit below, of a hot air chamber in the upper part ofthe casing and spaced from its wall, means passing centrally upwardlythrough the heater for conducting cold air into said chamber to beheated, a double wall outer casing in surrounding relation to the innercasing, an air space between the inner wall and the inner casing, and asmoke flue connected to the upper part of the inner casing, an annularair space between the double wall outer casing and the inner casing andin connnunication with the first air space, the upper end' of the innerwall of the'outcr ca sing having damper controlled openings, for thepassage of the air, which becomes heated in; the first air space, intothoroom;

2. In a heater, the combination with an aslrpit aeratear a hot air drumprovided with a chamber i concentric spaced relation to the innercasing, cold air flue extending through the bottom of theftlrnm andhaving the perforated e'ridwithin the interior of the chamber, a coldair draft flue extendinginto the fire box and having a perforated closedend immediately above the bed of the fire, an outer double wall casingin surrounding spaced relation to the inner casing, an air space betweenthe inner wall of the outer casing and the inner casing, an air spacebetween the inner and outer walls of the outer casing, in communicationwith the air space between the inner wall of the outer casing and theinner casing, the upper end of the inner wall of the outer casing havingopenings, dampers therefor for controlling the escape of heated air fromthe first air space, the air space between the inner and outer walls ofthe outer casing opening to the interior of the room.

4. In a heater, the combination with an inner casing provided with afire box, of a hot air drum in super-imposed relation to the fire box,of a pair of flues passing centrally upwardly through the fire box, onearranged within the other and terminating in a perforated end into thehot air drum, the other terminating in a perforated portion above thefire box, adapted for conveying cold air to the space surrounding thedrum.

\ 5. In a heater, the combination with an inner casing provided with afire box and an ash pit below, of a; hot air drum in the casing andspaced from its wall and being in. super-imposed relation to the firebox, means passing centrally upwardly through the heaterand through thefire box communicatively connecting with the interior of the drum andthe space surrounding the exterior of the drum, for conducting cold airin said respective portions of the heater, the upper end of the hot airdrum terminating in an exit opening, a double wall outer casing insurrounding spaced relation to the inner casin double wall outer casingand the inner cas-' ing, one of the walls of the outer casing havingopenings of communication with the air space between the double wallcasing and the inner casing, a cold air space between the double wallsof the outer casing and being open at the top and the bottom and havingopenings of communication with the first cold air space.

6. In a heater, the combination with an inner casing provided with afire box and an ash pit below, of a hot air drum spaced Within thecasing and being arranged above the fire box, a pair of cold air fiuespassing centrally upwardly through the heater, one communicativelyconnecting with the interior of the drum, the other communicativelyconnecting with the space surrounding the drum, the upper end of thedrum terminating in an exit opening, an outer casing surrounding theinner casing and comprising inner and outer walls, a cold air spacebetween the inner wall of the outer casing and the inner casing, a coldair space between the inner and outer walls of the outer casing, andbeing open atthe top and the bottom, the lower portion of the inner wallof the outer casing having openings of communication with the first coldair space, said inner wall of the outer casing having additionalopenings of communication between the two cold air spaces, and dampercontrolled openings in the top of the inner wall of the outer casing,for controlling the air in the first cold air space.

In testimony whereof I hereunto afiix my signature in the presence oftwo witnesses.

.WHITING P. MERRY.

Witnesses:

HARVEY V. BYERLY, MoRRIs BLOCI-I.

